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Method and device for detecting explosive-substance particles in a gas flow

A technology of explosives and granules, which is applied in the direction of measuring devices, sampling devices, and preparation of test samples, and can solve problems such as inability to detect

Inactive Publication Date: 2013-04-10
SPHEREA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage here is that only the larger particles remain in the adsorption net and the smaller particles pass through and thus cannot contribute to the detection

Method used

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  • Method and device for detecting explosive-substance particles in a gas flow
  • Method and device for detecting explosive-substance particles in a gas flow
  • Method and device for detecting explosive-substance particles in a gas flow

Examples

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Embodiment Construction

[0021] FIG. 1 schematically shows a first embodiment of a detection device 10 a which essentially consists of a microfilter 12 , a detector 14 and a suction pump 16 . Furthermore, an object 20 contaminated with explosive particles 18 is shown schematically, through which an air flow 22 is guided, which flows through the microfilter 12 and on to the detector 14 . Explosive particles 18 , which are shown greatly enlarged in the drawing, adhere to microfilter 12 because they cannot pass through microfilter 12 due to the selected pore size which is smaller than the size of explosive particles 18 . After a certain time, preferably approximately 10 to 20 s, enough explosive particles 18 have accumulated on microfilter 12 that microfilter 12 is heated to a temperature of preferably approximately 150 to 250° C. by means of heating device 24 . Due to the increased temperature, the explosive particles 18 are desorbed from the microfilter 12 and are converted into a gaseous phase in whic...

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Abstract

The invention relates to a method and device for detecting explosive-substance particles in a gas flow (46), wherein the gas flow (46) is conducted through an adsorption net (12) for a specified time period, wherein explosive-substance particles (18) are adsorbed onto the adsorption net, the adsorption net (12) is subsequently heated to a heating temperature, at which the explosive-substance particles (18) desorb, and a gas flow containing the desorbed explosive-substance particles is fed to a detector (40) in order to detect the explosive-substance particles, wherein a microfilter (12) having a pore size of less than the particle size of the explosive-substance particles (18) is used as the adsorption net.; Thus it is possible to collect practically all explosive-substance particles (18) contained in the gas flow (46) and to feed said explosive-substance particles to a subsequent detection process, whereby the sensitivity of the detection process is increased.

Description

technical field [0001] The invention relates to a method and a device for detecting explosive particles (Sprengstoffpartikel) in a gas flow, wherein the gas flow is guided through an adsorption net (Adsorptions netz) over a defined period of time, so that the explosive particles are adsorbed thereon, followed by The sorption mesh is heated to a heating temperature at which the explosive particles are desorbed, and the gas flow with the accumulated explosive particles is fed to a detector for its detection. Background technique [0002] A detection method or detection device is known from document US 6 604 406 B1. [0003] The increasing use of explosives for terrorist purposes, in particular in civil air traffic, creates an urgent need for effective explosives detectors, wherein in particular mobile or field-suitable (feldtauglich) systems are required. For example, when potential terrorists handle explosives, small explosive traces (sprengstoffspur) remain on clothing and ...

Claims

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Application Information

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IPC IPC(8): G01N1/22
CPCG01N1/2205G01N1/2214G01N1/40G01N1/405G01N2001/022G01N1/4005G01N33/0057
Inventor S.比尔T.齐曼A.弗里德贝格尔
Owner SPHEREA
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